All files / components/family upp-item.ts

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import { Component, OnChanges, OnDestroy } from '@angular/core';
import { Input } from '@angular/core';
import { ChangeDetectionStrategy, ChangeDetectorRef } from '@angular/core';
 
import { Subscription } from 'rxjs';
import { ViewRenderer } from '@unpispas/upp-wdgt';
 
import { languageService, languageSupport } from '@unpispas/upp-base';
import { dataService } from '@unpispas/upp-data';
import { viewService } from '@unpispas/upp-base';
 
import { FamilyProduct } from '@unpispas/upp-data';
import { PreselectView } from '@unpispas/upp-data';
import { ProductView } from '@unpispas/upp-data';
 
@Component({
    selector: 'upp-familyitem-view',
    changeDetection: ChangeDetectionStrategy.OnPush,
    templateUrl: './upp-item.html',
    styleUrls: [
      './upp-item.scss'
    ],
    providers: [{
        provide: ViewRenderer,
        useFactory: (change: ChangeDetectorRef) => new ViewRenderer(change),
        deps: [ChangeDetectorRef]
    }]       
})
export class UppFamilyItemComponent extends languageSupport implements OnChanges, OnDestroy {
    @Input() product: FamilyProduct | null = null;
 
    private _item: ProductView | PreselectView | null = null;
    get item(): ProductView | PreselectView | null {
        Iif (!this.product){
            return null;
        }
 
        if (!this._item){
            if (this.product.product){
                this._item = this.data.alives.get(this.product.product) as ProductView;
            }
 
            Iif (this.product.preselect){
                this._item = this.data.alives.get(this.product.preselect) as PreselectView;
            }
        }
 
        return this._item;
    }
 
    private _item_subscription: Subscription | null = null
 
    constructor(private lang: languageService, private change: ViewRenderer, private data: dataService, public view: viewService){
        super(lang, change.cdref);
    }
 
    ngOnChanges(){
        Iif (this._item_subscription){
            this._item_subscription.unsubscribe();
            this._item_subscription = null;
        }
 
        this._item = null;  // will refresh the underlying item
        if (this.item){
            this._item_subscription = this.item.OnViewRefresh.subscribe(
            () => {
                this.change.markForCheck();
            });
        }
    }
 
    ngOnDestroy(): void {
        super.OnDestroy();
 
        if (this._item_subscription){
            this._item_subscription.unsubscribe();
            this._item_subscription = null;
        }
    }
}